Hey everyone, My KFX 400 has a full Trinity Stage 5 Exhaust system and a K&N Air filter, and I was just wondering, is there any cheap mods I can do to it? Thanks.

 

C'mon guys, anything?

 

hmmm... how cheap?

you could re-gear to better suit your application

you could get an upgraded accelerator pump cover for supposedly better throttle response

you *MAY* be able to get a thinner base gasket for increased compression. im not really sure about on quads, but i know the drz400 guys do it all the time.

 

YFZ carb., adjustable CDI, shave the head .020-.025 a little extra compression, maybe lighten the flywheel for the cheap route.

 

I just put a 13 tooth front sprocket on my kfx 400 stock is 14 what a difference on the bottom end . gonna mess with the rear next got it off rocky mountain atv for like 10.00 bucks. hardly any difference from stock, weight wise etc.

 

Thanks for the info guys, I'm going to order the 13 tooth front sprocket, and jflib74, dont you loose top end when you gain low end? Thanks

 

You didnt say, but have you jetted your carb? I've got an 03 KFX with the FMF PowerCore 4, K&N, Jetted carb, Big Gun CDI. I went down to the 13 tooth since I ride wooded trails more than just straight haulin a$$. Big differance in low end. I dont do much straight line running so loosing a bit off the top really dident hurt my feelings. I ride the trails so much I dont even know if I have 5th gear anymore.

 

im lovin those black wheels. I just got my 03 put back together after painting the frame black. The black and lime green looks sweet!

 

Thanks man, I love the black wheels too! I gotta get new tires though, and yes my carb is jetted, and I'm going to get the 13 tooth sprocket, but I usually ride alot of trails and do some jumps, and I never really get out of 3rd or 4th gear, so will I notice a big loss in power? Thanks

 

Thanks man, I love the black wheels too! I gotta get new tires though, and yes my carb is jetted, and I'm going to get the 13 tooth sprocket, but I usually ride alot of trails and do some jumps, and I never really get out of 3rd or 4th gear, so will I notice a big loss in power? Thanks